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Had I known about this computer program,...

Had I known about this computer program, a huge amount of time and energy________.

A.would have been saved                 B.had been saved

C.will be saved                           D.was saved

 

A 【解析】 试题分析:句意:如果我了解电脑的话,大量时间和精力都会省下来了。如果省略if,那么把had,should,were提前,由从句的谓语动词可以看出这是对过去的虚拟,所以主句用would have done,故选A。 考点:考查虚拟语气的用法。
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